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cogl-pipeline-layer: Use CoglTextureType instead of GL target enum

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Instead of storing the GLenum for the target of the last used texture
for a layer it now stores the CoglTextureType instead. The state name
has been renamed to 'texture type' instead of 'texture target'.
Previously the default pipeline layer would store 0 here to represent
that there is no texture. This has been changed to store
COGL_TEXTURE_TYPE_2D instead which means that all pipeline layers
always have a valid value for the texture type. Any places that were
previously fetching the texture from a layer to determine the target
(for example when generating shaders or when enabling a particular
texture target) now use the texture type instead. This means they will
work even for layers that don't have a texture.

This also changes it so that when binding a fallback texture instead
of always using a 2D texture it will now use the default texture
corresponding to the texture type of the layer. That way when the
generated shader tries to do a texture lookup for that type of texture
it will get a valid texture object. To make this work the patch adds a
default texture for 3D textures to the context and also makes the
default rectangle texture actually be a rectangle texture instead of
using a 2D texture.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts
2012-02-09 12:52:45 +00:00
parent 8012eee31f
commit b96e6900f5
11 changed files with 205 additions and 173 deletions
Download Patch File Download Diff File Expand all files Collapse all files

79
cogl/cogl-pipeline-layer-state.c
View File

@ -129,12 +129,22 @@ cogl_pipeline_get_layer_texture (CoglPipeline *pipeline,
return _cogl_pipeline_layer_get_texture (layer);
}
static void
_cogl_pipeline_set_layer_texture_target (CoglPipeline *pipeline,
int layer_index,
GLenum target)
CoglTextureType
_cogl_pipeline_layer_get_texture_type (CoglPipelineLayer *layer)
{
CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_TEXTURE_TARGET;
CoglPipelineLayer *authority =
_cogl_pipeline_layer_get_authority (layer,
COGL_PIPELINE_LAYER_STATE_TEXTURE_TYPE);
return authority->texture_type;
}
static void
_cogl_pipeline_set_layer_texture_type (CoglPipeline *pipeline,
int layer_index,
CoglTextureType texture_type)
{
CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_TEXTURE_TYPE;
CoglPipelineLayer *layer;
CoglPipelineLayer *authority;
CoglPipelineLayer *new;
@ -151,7 +161,7 @@ _cogl_pipeline_set_layer_texture_target (CoglPipeline *pipeline,
* state we want to change */
authority = _cogl_pipeline_layer_get_authority (layer, change);
if (target == authority->target)
if (texture_type == authority->texture_type)
return;
new = _cogl_pipeline_layer_pre_change_notify (pipeline, layer, change);
@ -170,7 +180,7 @@ _cogl_pipeline_set_layer_texture_target (CoglPipeline *pipeline,
CoglPipelineLayer *old_authority =
_cogl_pipeline_layer_get_authority (parent, change);
if (old_authority->target == target)
if (old_authority->texture_type == texture_type)
{
layer->differences &= ~change;
@ -183,7 +193,7 @@ _cogl_pipeline_set_layer_texture_target (CoglPipeline *pipeline,
}
}
layer->target = target;
layer->texture_type = texture_type;
/* If we weren't previously the authority on this state then we need
* to extended our differences mask and so it's possible that some
@ -279,30 +289,13 @@ changed:
_cogl_pipeline_update_blend_enable (pipeline, COGL_PIPELINE_STATE_LAYERS);
}
/* A convenience for querying the target of a given texture that
* notably returns 0 for NULL textures - so we can say that a layer
* with no associated CoglTexture will have a texture target of 0.
*/
static GLenum
get_texture_target (CoglTexture *texture)
{
GLuint ignore_handle;
GLenum gl_target;
_COGL_RETURN_VAL_IF_FAIL (texture, 0);
cogl_texture_get_gl_texture (texture, &ignore_handle, &gl_target);
return gl_target;
}
void
cogl_pipeline_set_layer_texture (CoglPipeline *pipeline,
int layer_index,
CoglTexture *texture)
{
/* For the convenience of fragend code we separate texture state
* into the "target" and the "data", and setting a layer texture
* into the "type" and the "data", and setting a layer texture
* updates both of these properties.
*
* One example for why this is helpful is that the fragends may
@ -311,17 +304,22 @@ cogl_pipeline_set_layer_texture (CoglPipeline *pipeline,
* For the sake of determining if pipelines have equivalent fragment
* processing state we don't need to compare that the same
* underlying texture objects are referenced by the pipelines but we
* do need to see if they use the same texture targets. Making this
* do need to see if they use the same texture types. Making this
* distinction is much simpler if they are in different state
* groups.
*
* Note: if a NULL texture is set then we leave the target unchanged
* Note: if a NULL texture is set then we leave the type unchanged
* so we can avoid needlessly invalidating any associated fragment
* program.
*/
if (texture)
_cogl_pipeline_set_layer_texture_target (pipeline, layer_index,
get_texture_target (texture));
{
CoglTextureType texture_type =
_cogl_texture_get_type (texture);
_cogl_pipeline_set_layer_texture_type (pipeline,
layer_index,
texture_type);
}
_cogl_pipeline_set_layer_texture_data (pipeline, layer_index, texture);
}
@ -867,11 +865,11 @@ cogl_pipeline_add_layer_snippet (CoglPipeline *pipeline,
}
gboolean
_cogl_pipeline_layer_texture_target_equal (CoglPipelineLayer *authority0,
CoglPipelineLayer *authority1,
CoglPipelineEvalFlags flags)
_cogl_pipeline_layer_texture_type_equal (CoglPipelineLayer *authority0,
CoglPipelineLayer *authority1,
CoglPipelineEvalFlags flags)
{
return authority0->target == authority1->target;
return authority0->texture_type == authority1->texture_type;
}
gboolean
@ -1613,14 +1611,15 @@ _cogl_pipeline_layer_hash_unit_state (CoglPipelineLayer *authority,
}
void
_cogl_pipeline_layer_hash_texture_target_state (CoglPipelineLayer *authority,
CoglPipelineLayer **authorities,
CoglPipelineHashState *state)
_cogl_pipeline_layer_hash_texture_type_state (CoglPipelineLayer *authority,
CoglPipelineLayer **authorities,
CoglPipelineHashState *state)
{
GLenum gl_target = authority->target;
CoglTextureType texture_type = authority->texture_type;
state->hash =
_cogl_util_one_at_a_time_hash (state->hash, &gl_target, sizeof (gl_target));
state->hash = _cogl_util_one_at_a_time_hash (state->hash,
&texture_type,
sizeof (texture_type));
}
void